gcc version 4.4.0 20080827 (experimental) [trunk revision 138965] (GCC) produces:
/tmp/t.cc:9: error: initializer for pthread_once_t must be brace-enclosed /tmp/t.cc:9: error: initializer for pthread_once_t must be brace-enclosed /tmp/t.cc:9: error: initializer for pthread_once_t must be brace-enclosed /tmp/t.cc:9: error: initializer for pthread_once_t must be brace-enclosed /tmp/t.cc:9: error: initializer for pthread_once_t must be brace-enclosed /tmp/t.cc:9: error: initializer for pthread_once_t must be brace-enclosed /tmp/t.cc:9: error: initializer for pthread_once_t must be brace-enclosed [...] for struct pthread_once_t { }; struct test { pthread_once_t once; }; int main(void) { struct test foo = { once: PTHREAD_ONCE_INITIALIZER }; return 0; } :-( -- Summary: infinite loop in init Product: gcc Version: 4.4.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: mrs at apple dot com http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37260